Control of harrows



AprilS, 1941. n. H. LYsEDAi-IL CONTROL oF HAnaowsv Filed Aug. 17, 1940 2 Sheets-Sheet 1 H mw N www mw .S1 NNN fnl/ador mal ysedaizl MQ) April 8, 1941. a H. LYSEDAHL GONTROL 0F HARROWS Filed Aug. 17, 1940 2 Sheets-Sheet 2 Patented Apr. 8, 1941 CONTROL F HARROWS Roland n. Lysedahl, carpark, nl., assigner to International Harvester (Lompany, a corporation of New Jersey Application August 17, 1340, Serial No. 353,103

(Cl. 55--83i Claims.

This invention relates to a harrow control. More specifically it relates to adjustment of a hai-row either by tractor power or by turning of the tractor. l

It is known to adjust the gangs of a barrow by means of separate controls both by turning movement of the harrow and also by power of the tractor. The present invention is concernedwith the provision of control means for a harrow by which the harrow may be adjusted both by tractor power and by turningof the tractor.

An object of the present invention is to provide an improved harrow.

A further object is the provision of an improved control means for a narrow.

Another object is to provide a control means for shifting the gangs of a barrow both by tractor power and by turning of the tractor.

According tothe present invention, an offsetdisk harrow composed of pivotally connected gangs is pivotally connected by means of a hitch frame to the draw-bar of a tractor. The gangs are held in working position by means of an overcenter lock which is controlled by a chain member extending from the over-center lock on the Tear gang throughl a space enclosed by rollers oilset laterally from the point of connection of the harrow hitch frame to the tractor drawbar to a U-shaped bail embracing the body of the tractor and actuated by iluid power devices. The arrangement is such that for a right-hand turn, either turning ofthe tractor or movement ci the U-shaped bail may be relied upon for shifting of the gangs for a right turn. 'The U-shaped bail is also used for shifting the gangs into parallel transport position.

In the drawings: Y

Figure 1 is a plan View of an offset barrow in working position and the novel control means therefor; y

Figure 2 is a side view of the construction shown in Figure 1; and,

Figure 3 is a plan View similar to `Figure 1 but showing the barrow gangs in position for a turn to the right. I

is shown in Figure l, the offset harrow comprises a front gang it and a rear gang Il pivot.. ally connected to the front gang about a bolt l2 which pivotally connects brackets I 3 and i4 extending respectively from the front and rear gangs. The barrow is pivotally connected toro.

.IJ-shaped drawbar l5 of a tractor I6 at a point ll' by means oi a draft frame I8 formed of a transversely extending member I9 and a longi- The link 24 and the arm 25 are held in straighttudinally extending member 20. The transverse line position by means of an abutment extension 28 on the link 24 and a spring 29 carried on the member 30 extending from the rear gang Il. The spring 29 tends to rotate the arm 25 clockwise and movement of the arm beyond the straightline position with the link 24 is prevented by the abutment extension 28 on the link 2l. Thus the link 2l and the arm 25 are held in straightline position and may be considered to constitute an overcenter lock. The bell crank 26 also. has an arm Il to which is connected a link 32 and to this link is connected a chain 33 which extends Iorwardly between a pair of rollers 34 on the front gangs and is completely enclosed by the rollers,

the front gang, and a member 35 on top of the rollers. The chain also extends through a space oifset to the left of the pivot point il ot the hitch frame i8 on the tractor drawbar l5 and formed by an extension 3B on the draw-bar l5, a pair of rollers 31 mounted on the extension, and a member 38 positioned on top of the rollers 31. From the rollers 3l and 3B the chain extends forwardly through an enclosed space beneath a body 39 of the tractor IE, the space being formed by a member 4B carried beneath the body 39, a pair of rollers I carried beneath the member, and a member l2 carried beneath the rollers. The forward end oi the chain is connected to a rod 43 having a hook end M connected to a lll-shaped member I5 pivotally connected at it to the tractor body 39 and embracing the same. The U-shaped member 4E is controlled by a pair of huid power devices 41 as disclosed more fully in the cepending application of Carl W. Mott, Serial No. 321,- 154, iiled February 28; 1940. 'line uid power devices are shown more fully in the patent to Lindgren, 2,156,570, May 2, 1939.

When it is desired to turn the barrow to the right, a turn of the tractor to the right causes a forward movement of the rollers 31 slidably supporting the chain 33 with'respect to the point of draft connection l1 of the harrow with the tractor.. The result is that the chain is pulled forwardly so as to rotate the bell crank 2i coun.. terclockwise against the action or Ithe spring 29 and break the over-center lock formed by the arm 25 of the bell crank and the link 2|. Further pulling upon the chain I3 in a turn to the right vcauses the rear gang I l to be moved forwardly so that the gangs assume the relative position of 'Figure 3 in which position a turn to the 'right may be made. The narrows may also be released from locked position and `shifted i'or a right turn by action of the power of the tractor.

'I'he fluid power devices 4l may be actuated so as to move the U-shaped bail member forwardly; as a result, the chain 33 is moved forwardly, the over-center lock holding the gangs against relative movement is released and the gangs are shifted for the turn 'to the right. This shifting of the gangs by tractor power i'or a turn to the right may take place even before the tractor is turned to the right. The tractor power may also be used for shifting the gangs into parallel transport position. Normal operation-of the harrow and the control means therefor will include shifting of the gangs for a turn to the right through the action of the tractor in a turn to the right with no action by the tractor power, and

' shifting of the gangs to transport position by means of tractor power.

The advantage of the present construction is that the harrow gangs may be shifted for a turn to the right by means of a turn to the right of the tractor, and the gangs may be shifted to transport position without backing oi' the tractor with employment of only a single control means employed both for shifting of the gangs by turning and for shifting by tractor power.

The link 24 is connected to the front gang Ill by meansfof a latch 48 controlled by a cord 49 extending to the tractor and engaging any one of a series of holes 50 in the link 24. The particular hole 50 engaged determines the effective length of the link 24 and consequently,

the relative angle of the gangs in working position.

The intention is to limit the invention only within the spirit and scope of the appended t claims.

What is claimed is:

1. In combination, a tractor having a power plant, a harrow comprising front and rear gangs connected to one another for relative movement and to a point on the tractor, means connecting the harrow and a point on the tractor olf-set laterally in one direction from the lpoint of connection of the harrow with the tractor for changing the position of one gang with respect to one another for a turn in the opposite direction, and means connecting the aforesaid means and the tractor power plant for changing the position of one gang with respect to the other by tractor Power.

2. In combination, a tractor having a. power plant, a harrow connected to the rear of the tractor and comprising gangs connected to one another for relative movement, means connecting the harrow and the tractor for changing by a turn of the tractor in one direction the position of one gang with respect to the other for a turn of the harrow in that direction, and means connecting the aforesaid means and the tractor power plant for changing the position of one gang with respect to the other by tractor power.

3. In combination, a tractor ving a power plant, a harrow connected to the rear of the tractor and comprising gangs connected to` one another for relative movement, means holding the gangs against relative movement, means connecting the holding means and the tractor for releasing the holding means by a turn of the tractor, and means connecting the tractor power plant and the aforesaid 'means for releasing the holding means by tractor power.

4. In combination, a tractor having a power plant, a barrow comprising front and rear gangs connected to one another for relative movement and to a point on the tractor, means holding the gangs against relative movement, means connecting the holding means and a point on the tractor olf-set laterally in one direction from the point of connection of the harrow with the tractor for releasing the holding means for a turn of the barrow in the opposite direction, and means connecting the aforesaid means and the tractor power plant for releasing the holding means by tractor power.

5. In. combination, a tractor having a power plant, a pair of tools connected at the rear of the tractor, means for holding the tools against relative movement, means connecting the holding means and the trac-tor for releasing the holding means upon a turn of 'the tractor, and means connecting the tractor power plant and the aforesaid means for releasing the holding means by tractor power.

7. In combination, a tractor` having a powerv plant, a harrow comprising front and rear gangs connected to one another for relative movement and to a point atthe rear of Ithe tractor, meansconnecti-ng the harrow and the tractor power' plant and slidably supported at a point offset laterally from the point of connection of the hary row with the tractor.

8. In combination, a tractor having a power plant, a harrow comprising front and rear gangs connected to one another for relative movement and to a point at the rear of the tractor, means holding the gangs against relative movement, and means for releasing the holding means.' ysaid means connecting the holding means and the tractor power plant and being supported at a point oiTset laterally from the point of connection of the harrow with the tractor.

9. In combination, a tractor having a power plant and 'a body, a U-shaped bail pivotally connected to the body and embracing the underside oi' the tractor, means connecting the tractor power plant and the U-shaped bail, a harrow comprising front and rear gangs connected toone another for relative movement and to a point on the tractor. means for holding the gangs against relative movement, a pair of rollers mounted on the tractor so as to enclose a space at a point o'set laterally from the point of connection of the harrow with the tractor, and a exible connection between the holding means and a point on the U-shaped bail beneath the tractor passing between the space enclosed by the rollers.

lil. In combination, a tractor having a power plant and a body, a U-shaped bail pivotally connected to the body and embracing the underside of the tractor, means connecting the tractor eoeec nlant anal the U-shaped bail, a barrow comnrieine front and rear :ange connected to one another for relative movement and to a point on the tractor, n pair o! rollers mounted on the tractor so as to enclose a space at a point offcet laterally from the point of connection oi the narrow with the tractor, and a ilexible connection for shifting one gane with respect to anotlnee, enid connection extending between the how enel a, point on the U-shaped bail beneath tno tractor and passing between the space en- `cloned loir tim rollers.

` tite teectei' ice iteleeeine the lioioiine menne lee n teen oi tine tenctot", enti meent connectine tite nioreeein menne one tite tractor power nient ier A releeeine time noline means oy tractor` een it. in combination, a tractoxhavine e noteec.

einem en implement connecten to tine telecine",n

menne linie time iplcmcnt aeninet eolinet ment, means connecting the implement and the tractor for releasing the holding means and for adjusting the implement by a turn of the tractor, and meana connecting the aforesaid means and the tractor power plant for releasing the holding means and for adjusting the implement by tractor power.

14. In combination, a tractor having a power plant. a'peir of toole connected at the rear of the tractor and `to one another. means connecting the tools and thetrector for changing by a tum of the tractor time position oi one tool with respect to the other, ann menne connecting the aforesaid ineens end the tractor power plant for chansin 'by tractor power the position ci one tool with respect to the other.

l5. In comliination, a tractor imi/ine n power plant, e narrow connect-col to the tractor one 'conanrieine iront enel weer eenen connecten to one enothec, menne nomine" time eenen eeeinct reletiee eeceeinent, meent connectinn the tcector initie the iioicline menne enel e. enne; ion ieieecine the nomine menne een ice chaneine noci tion oi one eene tia connect to tice otiiee in" e. oi the ticectoxnI ene means conneetine tine nioeecein meent enel time trector loower plant ier releeainn the holding menne end ior chanoine the coeition of one acne' with respect to the other cy tractor newer.

it@ H. LYS. 

